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Question

Which hormone causes dialation of blood vessels, increased oxygen consumption and glycogenolysis?
  1. Glucagon
  2. ACTH
  3. Insulin
  4. Adrenaline


Solution

The correct option is D Adrenaline
Adrenaline is the hormone secreted by adrenal medulla. It prepares the animal to face special conditions created by physical stress. All these conditions required more energy which is provided by increasing heart beat, blood pressure, respiratory rate, sugar level of blood, blood supply of heart and skeletal muscles and brain through dilation of their small arteries, and oxidative metabolism. It also stimulates the breakdown of liver and muscle glycogen (glycogenolysis) to provide glucose for respiration.

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